Just 45 minutes from Lisbon lies the mystical, castle-filled hilltop town of Sintra, also a UNESCO World Heritage site due to its rich history.
One such castle is the Palace of Quinta da Regaleira. Gothic in style, from its outer structure to its ornate interior, the palace itself could keep you wandering for days.
But what makes this place so fascinating are the labyrinths of gardens, full of hidden tunnels, with wells that drop hundreds of feet into the ground and secret passageways that wind like mazes throughout the property. You could easily spend all day exploring the grounds and finding new adventures.
The well in this picture leads to a dark tunnel ending at a series of rocks you have to cross—over water, Indiana Jones style. If only those tunnels could talk...